Elevator



Patented Jan. -11, 1921.

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c. L. ,LA'NsiLL ELEVATOR.

APPLICATION FILED FEB.25, 1920.

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ELEVATOR.

APPLICATlON FILED FEBv 25. 1920y 1 ,365,252 Patented Jan. 11,` 1921.

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CHARLES L. LANGILL, 0F EVERETT, MASSACHUSETTS.

ELEVATOR.

Specification of Letters Patent.

Patented Jan. 11, 1921.

'Application led February 25, 1920. Serial No. 361,468.

f! 10 all whom t 'mary concerns Be it known that I, CHARLES L. LANGILL, a citizen of the United States of America, and a resident of Everett, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Elevators, of which the following is a specification.

rlhis invention relates to elevators and has for its object the production of a device of this character particularly adapted to lift cargoes from the holds of vessels.

The invention consists in certain novel features of construction and arrangement of parts which will be understood readily by reference to the description of the drawings and to the claims to be hereinafter given.

For the purpose of illustrating the invention, one preferred form `thereof is illustrated in the drawings, this form having been found to give satisfactory and reliable results although it is to be understood that the various instrumentalities of which the invention consists can be variously arranged and organized and the invention is not limited 'to the precise arrangement and organization of these instrumentalities as herein shown and described, except as required by the scope of the appended claims.

Of the drawings:

Figure 1 represents aplan of an apparatus embodying the principles of the present invention.

Fig. 2 represents a front elevation of the same showing one'side of the elevator lowered to form a run-way. i

Fig.l 3 represents a vertical section-of the saine on line 3,3, on Fig. 2.

Fig. 4- represents a horizontal 'section on line 4, 4, on Fig. 3.

Fig. 5 represents a vertical section on` line 5, 5, on Fig. 3.

Fig. 6 represents an elevation of the lower part of the; apparatus with the lifting devices in lowered position, and

Fig. 7 -represents a sectional detail to be hereinafter described.

lSimilar characters indicate like parts throughout the several figures of the drawings.

`In the drawings, 10 is a platform having on either side thereof, posts or uprights 11 f ing for one of having secured to the upper ends thereof the lateral brackets 12 having the outer ends connected together' by means of a plank 13.

Pivoted at* 14 to the platform 10 are side vwalls 15 rnormally retained in vertical position by means of the pivotedlocking members 16 having downwardly projecting shouders 17 adapted to engage the upper ends, of the side walls 15 when said wall are in vertical position.

Pivoted at 18 to the platform 10 are two -sets `of lazy tongs 19, the pivotal connections o f one pairof lazy tongs being connected by rods 2O to the pivotal connections of the other pair of lazy tongs. i

`The lower connecting rod 2Oa normally rests in a depression 21 in a cradle 22. a

Pivotally connected to the oppositeends of said cradle 22 are downwardly extend- `ing arms 23 having revoluble rollers 24 mounted on the lower ends thereof.

These rollers 24 are adapted to move over the surface of the floor when the arms 23 are moved about theirpivots. f

Each arm 23 has pivoted thereto, at 25, a link26, the opposite end of which has a cap 27 boltedthereto and forming a bearthe alined hubs 28 of a nut-29. f y* `The hubs 28 of each nut 29 have extensions 30 threaded thereto onfthe outer ends of each of which is a revoluble rollery 31 adapted to travel in a guideway 32 secured to the side wall of a block 33 vixedly secured in the hold of a vessel.

lThere are two blocks 33 and two guideways 32 and both of these are parallel and horizontal, the guideways 32 jserving to make the rollers 31 travel at all times in a horizontal path when the nuts 29 are moved toward and from eachother. l

The extensions 30 project 'through longitudinal slots 34 in the lower ends of the lowest members 35 of the lazy tongs 19.

Extending through and threaded toboth nuts 29 is a revoluble screw 36 `having a 'right and left hand thread, this screw havingits opposite ends so mountedvin bearings 36a as to prevent end movement of said screw 36 while permitting the same to freely rotate therein. y

Vhen the screw 36 is rotated, the nuts 29 are moved toward and from each other according to the direction of rotation of said screw.

One end of the screw 36 has a gear 37 secured thereto meshing with a pinion 3S revoluble in bearings 39 and having a squared extension 40 by which rotary movement may be imparted to said pinion 3S and to the screw 36 through the gear 37.

On each side of the platform l0 is a vertical guide 42 having a groove therein into which projects a rib 43 extending outwardly from the .uprights or posts ll.

The upper ends of the guides 42 are provided with sockets 44 adapted to receive the extensions 45 secured to the removable guideways 42a connected together at the upper ends by a bar 46.

`When the elevator is not in use, these removable guides 42?; may be detached from the guides 42 and stored in any convenient place until it is desired to load or unload the vessel.

lVhen the guides 42L have been mounted upon the guides 42 to form a continuation thereof, power may bev applied 'to the squared end 40 of the pinion 38 by means of a cra-nk or any other suitable motive power.

The rotation of the pinion 38 will drive the screw 36 and when rotated in yone direction the nuts 29 will be moved toward each other and extend the lazy tongs as indicated in Figs. 2 and 3 of the drawings, raising the platform 10 to the level of or above the level of the deck 47.

When freight has been lifted on the platform 10, to or above the level of the decl: 47, the pivoted locking members. 16-17 may be lifted to permit the side walls l5 to be lowered into the position indicated at the left of Fig. 2 of the drawings thereby forming a runway over which the freight is adapted to be moved from the platform 10 onto the deck 47.

The connecting rod 2On at the lower end of the lazy tongs 19, is always supported by means'of the cradle 22 during the raising `and lowering of the platform l0.

"When the screw '36 is rotated to move the nuts 29 toward and from each other, the bearings formed in the ends of the links 26 are adapted to move slightly about the axis of the hubs 28'as said links cause the arms 28 to be moved toward and from each other.

Inasmuch as these arms 23 have roll-ers 24 on the lower ends thereof always in contact with the iioor or deck, it is obvious that the cradle 22 will be given a rigid support at all times and the lazy tongs 19 will be prevented from collapsing owing to the position of the rod 20l in the bottom of the recess of said cradle 22.

This makes a very'convenient and simple device to be used in vessels for loading and unloading the cargo.

It is believed that the operation and many advantages of the invention will be understood without further description.

Having thus described my invention. I claim:

l. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; and means for raising said cradle.

2. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; arms pivoted in pairs to the opposite ends of said cradle; rollers on the lower ends of said arms; and means for moving said pairs of arms toward and from each other.

3. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of saidv guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; arms pivoted in pairs to the opposite sidesy of said f cradle; links pivoted thereto; a nut pivotally mounted in the opposite ends of each pair of links; and a revoluble screw coacting with said nuts.

4. In a device of the class described, a pair of vertical guides; a platform provided with projecting membersl coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform; rods connecting the two lazy tongs; a cradle in which the'lower rod is positioned; arms pivoted in pairs to the opposite sides of said cradle; links pivoted thereto; a nut pivotally mounted in the opposite ends of each pair of links; a revoluble screw coacting with said nuts; oppositely disposed horizontal guideways and rollers in said guideways revolubly mounted on alined extensions on said nuts.

5. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform, the lower arms of said lazy tongs being provided with longitudinal slots; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; arms pivoted in pairs' to the opposite ends of said cradle; links pivoted to said arms; a nut pivotally mounted in the opposite ends of each pair of links; alined extensions to each nut each projecting through one of said longitudinal slots; a roller on each extension; horizontal guideways for said rollers; and a revoluble screw coacting with said nut.

6. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform, the lower arms of said lazy tongs being provided with longitudinal slots; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; arms pivoted in pairs to the opposite ends of said cradle; links pivoted to said arms; a nut pivotally mounted in the opposite ends of each pair of links; alined extensions to each nut each projecting through one of said longitudinal slots; a roller on each extension; horizontal guideways for said rollers; a revoluble screw coacting with said nuts; a gear on an end of said screw; a pinion meshing therewith; and means for rotating said pinion.

7. In a device of the class described, a pair of vertical guides; a platform provided with projecting members coacting with and movable lengthwise of said guides; two lazy tongs beneath said platform and adapted to be extended to raise said platform, the lower arms of said lazy tongs being provided with longitudinal slots; rods connecting the two lazy tongs; a cradle in which the lower rod is positioned; arms pivoted in pairs to the opposite ends of said cradle; links pivoted to said arms; a nut pivotally mountedL in the opposite ends of each pair of links; alined extensions to each nut each projecting through one of said longitudinal slots; a roller on each extension; horizontal guideways for said rollers; a revoluble screw coacting with said nuts; and supporting roll-ers CHARLES L. LANGILL.

Witnesses:

WALTER E. LOMBARD, NATHAN C. LOMBARD. 

